Gang edger



3 Sheets-Sheet 1..

(No Model.)

GANG EDGER.

No. 399.931. Patented Mar. 19, 1889.

@ InUEnrur:

MTIIESS E5.

N. PETERS. Pholo-Lilhu m hen Wflshingmn, D. c.

s Sheets- Sheet 2.

(No Model.)

H. O. ROBB.

GANG EDGER.

Patented Mar. 19, 1889.

(No Model.) 3 sheets-sheet s.

H. O. ROBB.

GANG EDGER.

No. 399,931. Patented Mar. 19, 1889.

Win-125525: InUEnTur:

Nv PETERS, Phutoullmgnplmr. Washinglnn. D, C.

UNITED STATES PATENT OFFICE.

HERBERT O. ROBE, OF SAN FRANCISCO, CALIFORNIA.

. GANG-EDG ER.

SPECIFICATION forming part of Letters Patent No. 399,931, dated March 19, 1889.

I Application filed January 5, 1888. Serial No. 259,922. (No model.)

To all whom it may concern:

Be it known that I, HERBERT O. ROBE, a citizen of the United States, residing in the city and county of San Francisco, and State of California, have invented certain new and useful Improvements in Gang-Edgers; and I do hereby declare that the following is a full, clear, and exact description of my said invention, reference being had to the drawings that accompany and form part of this specification.

My invention relates to sawing-machines of the kind known as gang-edgers; and it includes certain improvements in feed-roll mechanism and saw-guides and adjusting means, the construction and operation whereof are fully explained in the following specification, in which the accompanying drawings are referred to by figures and letters.

Figure 1 of the said drawings is an end view, in elevation, of a machine with my improvements applied to it, the driving-pulleys and gearing that are located outside the frame being omitted. This figure is a view taken from the left-hand side of Fig. 2 and through the line 00 :20. Fig. 2 is a front view of the up per part of the machine at and above the feedrolls. Fig. 3 is a detail view, on a larger scale, showing a portion of the frame at the feedrolls and the adjustable saw-guides and their slides and locking mechanism. Fig. 4: is a top view of a saw-guide and its slide and locking device removed from the frame, the saw being shown in position and in section. Fig. 5 is a front view of the locking device. Fig. 6 is a detail view of the shifting-bearing for the friction-wheel.

Similar letters of reference indicate like parts in all the figures of the drawings.

These improvements are applied to gangedgers that are being made at the present time under certain Letters Patent granted to James A. Robb on or about the 25th day of May, 1880, and the 6th day of J une, 1882, respectively; and in the following description the saw-driving and feed-roll-driving mechanism, being of the construction already in use and forming no portion of the present invention, are not particularly shown and will not be specifically described.

A A are the side frames of the machine, and B is the saw-arbor.

O and C are the top and bottom feed-rolls of the front set, and C C are the corresponding rolls of the rear set.

D D are the saw-guides, and E E the slides of the guides.

Gr GX are the top and bottom plates or bars of the grooved cross-beam at the front of the frame in which the saw-guides are held.

The saws are indicated by dotted lines at X, Figs. 1 and 3.

The present improvement in feed-roll m echanism for gang-edgers consists in means operated by or from the saw-driving mechanism, or from a suitable driving-shaft outside for mechanically lifting the top feed-rolls.

H H are sliding platesone at each end or side of the machine outside the frames A, and mounted on roller-studs h it, that run in horizontal slots 72- 71 at the top part of the plates. The studs h are fixed in the upper part of the machine-frame.

I-I I-I are inclined slots in the plate H, running upward and backward and having equal slant.

I I are rollers on the ends of the top feedrolls, outside the frame, that rest in the inclined slots.

The top of the slotted plate is provided with a rack, J, and pinions on the ends of a shaft, K, above the frame, are set to engage these racks of the two plates H H. k k are the boxes of this shaft, and L is a pulley on it, from which a belt is carried up to the pulley N of an overhead shaft, P. Connection between the shaft P and a continuously-driven shaft, R, is made by friction-gearing, from which reverse motion is also obtained, so that the shaft P can be run either forward or backward. The pulley R takes a belt, R from the saw-arbor, and runs continuously with the machine, driving the shaft R in one direction. The end of the shaft has a friction-wheel, S, locked by a clutch, S, the shifting-lever of which is seen at S T T are friction-disks fast on the shaft P and set in position on opposite sides of the friction wheel, the distance between their faces being somewhat greater than the diameter of the wheel, and suitable lateral move? ment of the shaft B being provided in order to set the wheel against either one of the disks. These parts, as set and arranged in the manner shown in Figs. 1 and 2, will run the'shaft P forward when the wheel S is set against the disk T ,-while the motion will be reversed by shifting the wheel to the other disk, T. The feed-rolls of both sets are driven from the shaft P by a belt, P carried from the pulley P down to and around the large pulleys, which are fixed on the shafts of the lower rolls outside the frame. These pulleys are indicated by broken lines y y in Fig. 1, and are seen also in Fig. 2. Connection is made by suitable gearing, as shown in Fig. 1, between the bottom and'top rolls, and one is driven by the other at the same speed under all positions of elevation of the top roll. This is the usual manner of connecting feed-rolls in these machines.

Fig. 6 of the drawings illustrates the construction of the box R for the shaft R. It is formed with a circular groove, into which is fitted a circular block, R capable of being turned in the grooved seat, and a bearing, R for the shaft is made through the block, but above the center or eccentrically to the box R The lever R is fixed to the block at r, and is carried down to a position within reach of the sawyer at the side of the machine. By moving the lever to one side or the other of the vertical position the block R is turned in the box, and the shaft-bearing is thrown accordingly to one side or the other of the vertical center. Such movement brings the friction-wheel against the proper friction-disk and produces rotation of the shaft P in the required direction. In Fig. 2 of the drawings the friction-wheel is set on the center and is clear of both friction-disks. In the operation of these parts the contact of the friction-wheel with the disk of the shaft P turns the shaft K in the direction of the arrow m, Fig. 1, and runs the slotted plates H forward on the rollers. Both top rolls are lifted by the action of the inclined slots. The clutch S serves to control the motion of the shaft P and to start and stop the rolls, while the tightener-pulley m is provided for throwing the pinion-shaft into play to move the slotted frames H. M M are lever-arms, loose on the shaft K and carrying the tightener-pulley m between them at one end. The friction is not suiiicient to run the shaft K until the belt is tightened in this manner, and thus the sliding frames II are started and stopped through the medium of the lever M. v A

Figs. 1, 3, 4, and 5 of the drawings show more particularly the saw-setting mechanism. V is the slide or carriage, and G G the slotted guide-beam and supporting-rails under it, be tween which all these slides are set. V V are two plates bolted at o to the upright rear arm of the slide and extending back to the saw-arbor with a space between them for the saw 03 to run in. The saw-collar 00 has turned-off ends and the arms 12 have circular openings at the ends to fit over them. The inner faces of the plates around the openings are grooved and filled with soft metal, as shown at 0 Fig. 4. Bearing plates 11* y*, of brass, are fixed against the inner sides of the plates V, to set against the saw and hold it true. These bearing-plates are fixed by screws if, so that they can be taken out and renewed when worn. The slots w 10 w &c., on the under face of the beam run lengthwise, and each slide or carriage V has a slide-bar, V to set and run in one of the slots, each slide having this bar standing at a right angle across it and in position to take in its own slot, so that one slide runs in a different slot from the next slide to it. This permits the saw-carriers to be set up quite close together and yet allows a long slide, V to be used. The horizontal part of the carriage V travels on the two bars Gr and the upright arms at front and back stand outside of the beam G. The front one is furnished with a handle, V.

Having thus fully described my invention, what I claim, and desire to secure by Letters Patent, is-

1. In combination with the feed-rolls of a gang-edger, the sliding plate or frame H, having inclined slots H H in which the ends of the upper feed-rolls are set, the rack J, pinionshaft K, geared into said rack, a driven shaft, P, and mechanism, substantially as described, by which the pinion-shaft is connected with and disconnected from the driven shaft, to actuate the same and move the slides, as set forth.

2. A feed-roll-lifting mechanism consisting, essentially, of the slotted. frames 11, mounted for rectilinear movement, as described, and having inclined slots to take the ends of the rolls to be lifted, a shaft, K, carrying pinions engaging racks on said frames, a driven shaft, P, capable of reversible motion, and mechanism, as a belt and a pulley, and a tightenerpulley which is adapted to connect and disconnect the pinion shaft to and from the driven shaft, substantially as hereinbefore described.

3. The feed-rolls and the sliding plates H, having inclined slots which are adapted to 'engage the ends of a rollto be lifted and mounted for rectilinear movement, as described, and mechanism, in .combination therewith, actuated by or from a driven shaft,by which said plates are moved and the rolls raised, substantially as hereinbefore described.

4. The combination of the sliding frame H, having inclined slots H H, the feed-rolls, the upper of which have rollers I I that rest in the inclined slots, the pinion-shaft K above the frames, having pinions that engage racks on frames H H, the overhead reversible shaft P, the pulley L on shaft K, connected by belt with pulley N on shaft P, the belt P carried In testimony that I claim the foregoing I have hereunto set my hand and seal.

, HERBERT o. ROBE. [n 3.

\Vitn esses EDWARD E. OSBORNE, JAMES A. 'ROBB'. 

